Electromechanical properties of Ce-doped (Ba0.85Ca0.15)(Zr0.1Ti0.9)O3 lead-free piezoceramics

• Main Authors: Raziye Hayati, Mohammad Ali Bahrevar, Yadolah Ganjkhanlou, Virginia Rojas, Jurij Koruza
• Format: Article
• Language: English
• Published: SpringerOpen 2019-06-01
• Series: Journal of Advanced Ceramics
• Subjects: lead-free piezoceramic; (Ba,Ca)(Zr,Ti)O3 (BCZT); cerium; actuator
• Online Access: http://link.springer.com/article/10.1007/s40145-018-0304-2

Abstract Lead-free piezoceramics based on the (Ba, Ca)(Zr, Ti)O3 (BCZT) system exhibit excellent electromechanical properties for low-temperature actuation applications, but suffer from relatively high processing temperatures. Here we demonstrate an approach for the reduction of the sintering temperature and simultaneous increase of the electromechanical strain response of (Ba, Ca)(Zr, Ti)O3 piezoceramics by aliovalent doping with Ce. The samples were prepared by solid state synthesis and their crystallographic structure, dielectric, ferroelectric, and electromechanical properties were investigated. The highest d*33 value of 1189 pm/V was obtained for the sample with 0.05 mol% Ce, substituted on the A-site of the perovskite lattice. The results indicate a large potential of these materials for off-resonance piezoelectric actuators.